Because the profile of a router bit appears to be the opposite shape of the cut it makes, it often takes a second glance to select the correct cutter for the desired shape.
shop tip

For a reference of the bit profile, shape an 8" length of scrap material with each bit. Trim the profile to a shorter length and hang the profile near the respective bit. Hold the profile to the end of your workpiece before you make any cuts. Be careful to always replace the profiles and bits in the correct storage spots.
—From the WOOD magazine shop